The diagnosis is NSR, isorhythmic dissociation, acute ST-segment elevation MI (STEMI) of the lateral wall, and poor R-wave progression across the precordium (clockwise rotation). The rhythm is ...

The morphology resembles neither a left nor a right bundle branch block. Q waves occur in leads II, aVF, and V5-V6 (↑). The ST segment is also elevated in these leads ( ).